Hi. i?m implementing a new Vlan envoirement using a Linux box as router ( kernel 2.6.15-1.2054_FC5 ). i did the necessary configuration on Vlan 1 and Vlan 5 ( for example ), the problem is that i?m not able to communicate with my switch ( Cisco 3500 xl ), for my point of view i have the probleme might be the 8021q module on kernel. modinfo 8021q : filename: /lib/modules/2.6.15-1.2054_FC5/kernel/net/8021q/8021q.ko license: GPL version: 1.8 vermagic: 2.6.15-1.2054_FC5 686 REGPARM 4KSTACKS gcc-4.1 depends: srcversion: AA8F0449BB8246E05CCE929 [root@elefante ~]# uname -a Linux xxx 2.6.15-1.2054_FC5 #1 Tue Mar 14 15:48:33 EST 2006 i686 i686 i386 GNU/Linux i have other implementation working on other network with older kernel, this time with enterasys switch : modinfo 8021q: filename: /lib/modules/2.6.10-1.770_FC3smp/kernel/net/8021q/8021q.ko version: 1.8 license: GPL srcversion: 3F848155A70A338EA699517 depends: vermagic: 2.6.10-1.770_FC3smp SMP gcc-3.4 Thanks, Duarte